ML to Ounces Converter

How to Use This Tool

One US fluid ounce equals 29.5735 mL. Divide milliliters by 29.5735 to get fluid ounces.

This is fluid ounces — a volume measurement. It’s not the ounces you’d use to weigh dry ingredients on a kitchen scale. For reference, 600 mL comes out to about 20.3 fl oz, and 70 mL comes out to about 2.4 fl oz.

Formula both directions

• mL to fluid ounces: fl oz = mL ÷ 29.5735
• Fluid ounces to mL: mL = fl oz × 29.5735
• Quick estimate: mL ÷ 30 gets close enough for casual reading — a 1% margin, since 30 is a rounded-up version of 29.5735

Fluid ounces measure volume, or how much space a liquid takes up. Regular ounces on a food label usually measure weight instead.

The two only line up for substances with a density close to water. That’s why one label can read “12 fl oz (355 mL)” while another says “12 oz” and means something different for honey or oil.

Reference table: mL to fluid ounces

Reference table: fluid ounces to mL

Why 29.5735 is the number

The US fluid ounce equals 1/128 of a US gallon. The US gallon itself is fixed at 231 cubic inches. Run that math through to metric, and you land on 29.5735 mL per fluid ounce.

The UK imperial fluid ounce is a different size: 28.4131 mL. Britain defines its gallon differently — 1/160 of an imperial gallon rather than 1/128 of a US gallon.

That gap matters in practice. Convert 600 mL using the US standard and you get 20.29 fl oz. Convert the same 600 mL using the imperial standard and you get 21.12 fl oz — a real difference if you grab the wrong one.

Worked examples

A 600 mL water bottle: 600 ÷ 29.5735 = 20.29 fl oz. That’s noticeably larger than a standard 16.9 fl oz (500 mL) bottled water.

A 70 mL travel bottle: 70 ÷ 29.5735 = 2.37 fl oz. That clears the common 2 oz airline liquid allowance in some regions, but stays under the 3.4 oz (100 mL) TSA limit in the US.

A 2,000 mL container: 2,000 ÷ 29.5735 = 67.63 fl oz. That’s a bit more than half a gallon, which runs 64 fl oz.

The mistake that trips people up

Fluid ounces measure volume. Regular ounces measure weight. For plain water, the two are almost interchangeable — 1 fl oz of water weighs almost exactly 1 oz.

That’s exactly why people assume the conversion always works that way. It doesn’t.

A fluid ounce of honey weighs about 1.5 oz, because honey is denser than water. A fluid ounce of vegetable oil weighs less than 1 oz, because oil is less dense.

If a label doesn’t clearly say “fl oz,” and the ingredient isn’t water, don’t assume a 1:1 swap. Check the density first.

Where these mL figures come from

These specific sizes show up in searches for a reason. A 600 mL bottle is a common sports-drink size across the US and Europe.

A 2,000 mL bottle is a standard large soda size. It’s also a frequently cited daily water-intake target. A 70 mL bottle matches typical travel-size toiletries and airline liquid limits.

Shoppers search these numbers because imported packaging lists sizes in mL. They want to compare that figure to the fl oz sizes on their usual shelf.

A shopper checking a European mineral water label often sees “750 mL” with no fl oz printed anywhere. Running that through the formula gives 25.36 fl oz, close to a standard US wine bottle.

A useful anchor: standard US bottled water runs 16.9 fl oz (500 mL). A 600 mL bottle is about 20% bigger — roughly 3.4 fl oz more — which is why some imported bottles feel noticeably larger in hand.

Frequently Asked Questions

How many fl oz is 600 mL?
600 ÷ 29.5735 = 20.29 fl oz, using the US fluid ounce.

How many ounces is 800 mL?
800 ÷ 29.5735 = 27.05 fl oz.

How many oz is 2000 mL?
2,000 ÷ 29.5735 = 67.63 fl oz — a bit more than half a US gallon.

How much is 70 mL in oz?
70 ÷ 29.5735 = 2.37 fl oz, roughly a small travel-size bottle.

Is 1 mL the same as 1 oz?
No. One mL equals 0.034 fl oz. It takes about 29.57 mL to make one fluid ounce.

Is a UK fluid ounce the same as a US fluid ounce?
No. The UK fluid ounce runs 28.4131 mL, slightly smaller than the US fluid ounce at 29.5735 mL, because each country defines its gallon differently.